A more thorough explanation:

A blind trust is a type of trust where the trustor (the person who creates the trust) and the beneficiary (the person who receives the assets from the trust) do not know what assets are inside the trust after it is created. Instead, a trustee manages the trust until the assets are supposed to be given to the beneficiaries or until the trustor decides to close the trust (if it is a revocable trust).

People often use blind trusts to avoid conflicts of interest or to hide assets from beneficiaries. For example, politicians, corporate officers, and other public figures may put their investments into a blind trust before taking on new ventures. This way, they can avoid any accusations of favoritism or bias towards certain companies or industries.

However, blind trusts are not foolproof. While the trustor and beneficiary may not know what assets are in the trust, they still know what assets they put into the trust. This means that they may still have a conflict of interest, even if they are not aware of the specific assets in the trust.

Another use of blind trusts for politicians is to avoid disclosing their assets when they are elected to office. Normally, politicians must disclose what assets they own, but they can avoid this by placing their assets into a blind trust. This prevents them from having to disclose the contents of the trust.

For example, if a politician owns stock in a company that may be affected by a new law they are proposing, they could put that stock into a blind trust. This way, they would not be accused of passing the law to benefit themselves financially.